User device cannot get assigned IP address

nng25 · October 5, 2024, 1:36am

Hi,

I am a newbie with OpenWrt and hope someone helps me fix the problem above.

Here's the layout:

Router TP-Link Archer C7 v2:
OpenWrt 23.05.3 r23809
Configuration using LuCI

The router connects LAN port #2 (as labeled on the back) connecting to a PFSense device. Using VLAN ID3. I configured on PFSense similar VLAN ID 3 and an DHCP server up there.

When connecting to the router using Wifi or another port, it would not be able to get an assigned IP address from DHCP server on the PFSense.

It would get an IP address: 169.254.43.156

When looked into the firewall log of PFSense, I see this:

"@2 block drop in log quick inet from 169.254.0.0/16 to any label
"Block IPv4 link-local" ridentifier 1000000101"

The IP address should be 10.0.10.x instead. On the VLAN ID3 on PFSense, I allow all network connections just to see if it works, but it does not.

The router has a DHCP client interface.

Here's the network file:

config interface 'loopback'
        option device 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config globals 'globals'
        option ula_prefix 'fda0:b480:89be::/48'

config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth1.1'

config interface 'lan'
        option device 'br-lan'
        option proto 'static'
        option ipaddr '192.168.10.1'
        option netmask '255.255.255.0'
        option ip6assign '60'

config interface 'wan'
        option device 'eth0.2'
        option proto 'dhcp'

config interface 'wan6'
        option device 'eth0.2'
        option proto 'dhcpv6'

config switch
        option name 'switch0'
        option reset '1'
        option enable_vlan '1'

config switch_vlan
        option device 'switch0'
        option vlan '1'
        option ports '0t 2 3 5'
        option vid '1'

config switch_vlan
        option device 'switch0'
        option vlan '2'
        option ports '6t 1'
        option vid '2'

config switch_vlan
        option device 'switch0'
        option vlan '3'
        option ports '0t 3t 4'
        option vid '3'

config device
        option name 'eth1.3'
        option type '8021q'
        option ifname 'eth1'
        option vid '3'

config interface 'children_lan'
        option proto 'dhcp'
        option device 'br_children'
        option type 'bridge'

config device
        option type 'bridge'
        option name 'br_children'
        list ports 'eth1.3'

psherman · October 5, 2024, 2:19am

Delete this:

I recommend using a dash instead of an underscore for the bridge:

config device
        option type 'bridge'
        option name 'br-children'
        list ports 'eth1.3'

Make this unmanaged and remove the bridge line, and then fix the device to use a dash:

It will look like this:

config interface 'children_lan'
        option proto 'none'
        option device 'br-children''

Reboot and test again. If it still doesn’t work, post the updated config for review.

nng25 · October 5, 2024, 3:00am

Thank you for the feedback. I still experience the same issue. Here's an updated /etc/config/network file:

config interface 'loopback'
        option device 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config globals 'globals'
        option ula_prefix 'fda0:b480:89be::/48'

config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth1.1'

config interface 'lan'
        option device 'br-lan'
        option proto 'static'
        option ipaddr '192.168.10.1'
        option netmask '255.255.255.0'
        option ip6assign '60'

config interface 'wan'
        option device 'eth0.2'
        option proto 'dhcp'

config interface 'wan6'
        option device 'eth0.2'
        option proto 'dhcpv6'

config switch
        option name 'switch0'
        option reset '1'
        option enable_vlan '1'

config switch_vlan
        option device 'switch0'
        option vlan '1'
        option ports '0t 2 3 5'
        option vid '1'

config switch_vlan
        option device 'switch0'
        option vlan '2'
        option ports '6t 1'
        option vid '2'

config switch_vlan
        option device 'switch0'
        option vlan '3'
        option ports '0t 3t 4'
        option vid '3'

config interface 'children_lan'
        option proto 'none'
        option device 'br-children'

config device
        option type 'bridge'
        option name 'br-children'
        list ports 'eth1.3'

psherman · October 5, 2024, 3:09am

This looks correct. What happens if you plug a computer into port lan3? Does it get an ip address?

How have you verified the upstream connection for vlan3? Is this device directly connected to the router or is there a switch between them?

nng25 · October 5, 2024, 4:02am

When connecting a computer to port #3, it does not work either. I am configuring the computer to use VLAN ID3 directly to the PFSense to so I can isolate the issue as you advised.

psherman · October 5, 2024, 4:43am

Please report back on the status of this network once you have been able to test it. I predict that it is not properly configured on the pfsense side.

nng25 · October 6, 2024, 6:04am

I have tested and everything is now working. I applied your changes, and also restarted the PFsense device and it works. Thank you.

system · October 16, 2024, 6:04am

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